Web guide



Nov. 14, 1950 L. HORNBOSTEL I 2,530,122

" WEB GUIDE Filed May 26, 1948 2 Sheets-Sheet 1 EYV'ETJfUZ" Fiffys.

Nov. 14, 1950 L. HORNBOSTEL WEB GUIDE 2 Sheets-Sheet 2 File d May 26,1948 Fa HM 7 2 T 6,, 0

Patented Nov. 14, 1950 Lloyd Hornbostel,

Beloit, Wis., assignor to Beloit Iron Works, Beloit, Wis., a corporationof Wisconsln Application May 26, 1948, Serial No. 29,203

. 1 I This invention relates to paper making machines, and moreparticularly to a guide to retain a web such as a felt or wire in properalignment as it travels over supporting rolls.

Various devices have heretofore been made to retain the web centered onthe rolls of a paper 6 Claims. (Cl. 74-241) making machine and maintainit inthat position; but such devices have been rather costly tomanufacture and are delicate in operation.

In web guides heretofore made, the construction was such that thecontrol member had to be situated close to the point of control. It hasbeen found desirable to have the control member itself located at apoint adjacent the operator so that he can conveniently adjust it toproperly guide the web. The operating mechanism to move the web on therolls may be more con-' veniently placed at a point somewhat remote fromthe control member.

It is an object of the present invention to provide a web guide forpaper making machines which will be simple in construction andeconomical to manufacture.

Another object is to provide a web guide which will be rugged, andrelatively free from failures.

A further object is to provide a web guide which lends itself readily toremote control.

A still further object is to provide a web guide which will have fullhydraulic control.

Another object of the invention is to provide a web guide control whichmay be remotely actuated.

Other objects and advantages of the invention will become apparent uponconsidering the following specification, which, when read in connectionwith the accompanying drawings, illustrate a preferred form of theinvention.

On the drawings:

Figure 1 is an end elevational view partly in cross section, showing aweb guide embodying a preferred form of the present invention.

Figure 2 is a side elevational view of the guide roll and actuatorshown'in Figure 1;

Figure 3 is a cross-sectional plan view of the control valve and controlpaddle;

Figure 4 is a plan view to somewhat reduced scale of the web guide andcontrol, showing the belt in maximum position towards the left; and

Figure 5 is a view similar to Figure 4, but showing the belt in maximumposition toward the right.

Referring to the drawings, a felt web l0 passes over a plurality ofrolls (not shown) on which the web must remain centered. A guide roll l2is supported from a frame l4 in any convenient 2 manner, such as bymounting the roll in a spherical bearing IS in the lower end of a linkH, the link being pivotally supported on a pin l8 in the upper ,part ofthe frame l4. The opposite end of the roll I2 is supported on a frame l9which may be an integral part of the frame H by means of a sphericalbearing 20 so that as the link I! pivots about the pin l8, the guideroll will rotate freely between the spherical bearings I5 and 20.

The link I1 is joined to an actuating diaphragm 22 by a pressure rod 24which may be rigidly connected to a diaphragm support 28 and pivotallyconnected to the link in the usual manner. The diaphragm 22 is held in adiaphragm chamber 25 by means of a link 23 pivotally connected to boththe frame and the central portion of the diaphragm support 28. Pressurein the chamber 25 moves the link to the right, as shown in Figure 1,against the tension of a spring 21.

Upon release of pressure in the chamber 25, the, spring 21 moves thelower end of the link H to the left, as seen in Figure 1.

Fluid, such as air, may enter the chamber 25 through a pipe 30. The airis'supplied from a source (not shown) through a pipe 3| from whence itpasses through a pressure regulating valve 32, the pressure beyond thevalve 32 being recorded on a gauge 33. The valve 32 limits the maximumpressure in the line beyond the valve so that it does not rise above adesired maximum, and may be set at any pressure desired.

A bleed or needle valve 35 permits the air to pass slowly into a T 36from whence it enters the pipe 30 to the chamber 25. The second branchof the T has a pipe 38 connected thereto which leads to a relief valve40. As shown in Figure 1, the relief valve 40 is mounted on a standard39 and held in adjusted position by means of a set screw 39'.

The relief valve 40 may comprise a hollow conical member 4| and a solidconical member 42 having an annular groove 43 thereabout, the member 42fitting within the member 4| and capable of forming a tight fit therein.The air from the pipe 38 enters the hollow conical member 4| at thetop'adjacent a groove 43 and may bleed out between the members 4| and42, the amount of bleeding depending upon the separation between theconical members 4| and 42.

The maximum rate of bleeding of the valve 40 is small as compared withthe capacity of the diaphragm chamber 25, so that small changes in thesetting of the valve 40 do not immediately effect movement of thediaphragm 22.

a,sso,1aa 1 3 A bracket l! is mounted on one sideoi the bleed valve 40,and has a link 4| which is pivoted at one end thereto. A link It ispivotally connected to the bracket 41 and has an actuator rod Itpivotaliy connected to its opposite end. The rod It is pivotallyconnected to the solid conical member I through an ear 5i formed on 1the base oi the conical member #2.

A second bracket II is formed on the valve ll substantially opposite tothe bracket l1 and carries a tension spring It, which is connected atits opposite ends to the bracket 53 and the free end of the actuator rodIt and constantly urges the valve 40 into closed position.

Regulating screws II and 51 contact the tip oi the cone 4! and an earIt. respectively, to limit inward movement 01' the conical member 42,and permit complete closing of the valve while at the same timepreventing binding of the conical members ll and 41.

A paddle O0 is carried on the end of the actuator rod 50 opposite thespring 55, the paddle ll contacting the edge of the felt web l0. As theweb it moves from one side 0! the roll I! to the other, it moves thepaddle to correspondingly, causing the valve it either to open or toclose.

The paddle may be positioned on the web ill with the web in its desiredposition by means oi the set screw lt'fso that approximately onehalf themaximum pressure bleeds out of the chamber 25 through the valve 40. Whenthis condition is attained, the paddle 60 and the roll I! may be said tobe in neutral position and the axis of the roll i2 is at right angles tothe direction of travel of the web. As long as the paddle and rollretain this neutral position, the

web It continues to move over the roll [2 and the roll i2 does noteilect its lateral movement.

However, it the edge of the web i0 moves to the left, as seen in theplan views oi Figures 4 and 5, the paddle 80 will close the valve 40cansing air pressure to build up in the diaphragm chamber 25 and causethat end of the roll to move to the right, as seen in Figure 1, or tothe position shown in Figure 5. The roll 12 would then efiect lateralmovement 0! the web it to the right, returning the paddle 50 towards itsneutral position. As the paddle so moves toward its neutral position, itgradually opens the valve 40 wider causing more air to bleed out of thevalve and reducing the pressur in the chamber 25. As the pressure in thechamber 25 is reduced, the spring 21 returns the roll l2 towards itsneutral position. Thus both the paddle it and the roll l2 move towardstheir neutral position simultaneously and, as the paddle ID regains itsneutral position, the roll l2 has regained its neutral position, and nofurther lateral movement of the web takes place.

Should the web move to the right. the paddle moves to the right andopens the valve 40 wider permitting more air to bleed out of thediaphragm chamber 25. The reduced pressure in the diaphragm chamber 25permits the spring 21 to move that end oi the roll i2 forward along thedirection of travel of the web III as seen in Figure 4. Movement oi thatend of the roll forwardly along the direction of the web causes the webto move laterally to the left as seen in Figure 4 which in turn returnsthe paddle 80 towards its neutral position. As the paddle fill movestowards its neutral position, it gradually closes the valve 40 whichcauses less air to bleed from the chamber 25 and permits air enteringthe v pipe ,8. from the bleed valve 8! to build up pressure within thatchamber. The increased pressure oi the air in the chamber It acts on theconnecting rod 24 to move that end of the roll ii to the right as seenin Fig. 1 against the action oi the spring 21. Thus the roll i2 and thepaddle it. simultaneously move towards their neutral position and, whenthe paddle 60 reaches its neutral position, the roll I! also reaches itsneutral position and no iurther movement ensues. a

For each-setting of the pressure regulating valve 81; there is acorresponding position of the paddle st and hence oi the web it, whichwill cause lust suilicient air to bleed from the valve ll to retain theroll ii in its neutral position, or perpendicular to the longitudinalaxis oi the web. The position oi the web on the machine may, thereiore,be adjusted by varying the setting oi the pressure regulating valve 32.4

It will be noted that the neutral position of the web may also be variedon the roll by turning the valve 4. slightly on itsstandard 39 andretaining it in the desired position by the set screw 39' withoutvarying the setting oi the valve 32.

The web II is thus kept centered at any desired position on the rollsand maintained in that position constantly.

It is obvious that the guide roll l2 may be placed at any position alongthe machine, and that the paddle t0 and bleed valve 40 may be positionedat any point on the web convenient to the operator. .The operator maythus control the position of his web while not being bothered by theproximity of the guide roll i2.

The heretofore described invention is to be taken merely as a preferrediorm thereof, and

-it is to be understood that various changes in size, shape andarrangement oi parts may be made without departing from the spirit ofthe invention or the scope of the subjoined claims.

That which is claimed as new and is desired to be secured by UnitedStates Letters Patent is: 1. In a traveling web guide of the characterdescribed, a guide roll. a spherical bearing supporting one end of saidroll, a frame, a link pivotally connected to said frame, a sphericalbearing in the lower end of said link adapted to receive and rotatablysupport the opposite end of said guide roll, a chamber-defining membercarried by said frame, a diaphragm in said chamber, a pressure rodconnecting said diaphragm with said link whereby pressure in saidchamber moves that end of the roll rearwardly relative to the movementof said web, a spring connecting said link with said frame andconstantly urging the last named end of the roll forwardly along thedirection of the movement of the web and against the action of saidpressure rod, means to supply pressureslowly to said chamber, a bleedvalve adapted to bleed air from the source and from said chamber, apaddle contacting the edge of said traveling web,'and means connectingthe paddle to said bleed valve whereby movement of the web transverselyin one direction bleeds air from the chamber and movement of the webtransversely in the other direction closes the bleed valve to permit airto build up in the chamber.

2. In a traveling web guide of the character described, a guide roll, abearing supporting one end of said roll to provide universal movementtherefor, a frame. a link pivotaily connected to said frame, a bearingin the lower end of said link adapted to receive and rotatably supportthe opposite end of said guide roll for movement about said pivot, apressure rod connected with said link whereby pressure on the rod movesthat end of the roll rearwardly relative to the movement of said web,means connected to said link and constantly urging the last named end ofthe roll forwardly along the direction of the movement of the web andagainst the action of said pressure rod, means to vary pressure slowlyagainst said rod, a paddle contacting the edge of said traveling web,and means connected to the paddle to actuate said rod whereby movementof the web transversely in one direction increases pressure on said rod,and movement of the web transversely in the other direction decreasespressure on said rod.

3. In a traveling web guide of the character described, a guide roll, aspherical bearing supporting one end of said roll, a frame, a linkpivotally connected to said frame, a spherical bearing in the lower endof said link adapted to receive and rotatably support the opposite endof said guide roll while permitting limited longitudinal movement, apressure chamber-defining member carried by said frame, a diaphragm insaid chamber, a pressure rod connecting said diaphragm with said linkwhereby an increase in pressure in said chamber moves that end of theroll rearwardly relative to the movement of said web, means operableupon a decrease in pressure to move the roll forwardly along thedirection of the movement of the web and against the action of saidpressure rod, means to supply pressure slowly to said chamber, a bleedvalve adapted to bleed air from the source and from said chamber, apaddle contacting the edge of said traveling web, and means connectingthe paddle to said bleed valve whereby movement of the web transverselyin one direction bleeds air from the chamber and movement of the webtransversely in the other direction closes the bleed valve to permit airto build up in the chamber.

4. In a traveling web guide of the character described, a frame, a guideroll mounted in said frame and journaled at one end in a sphericalbearing and at the other end in a pivoted link for free rotation withsaid other end thereof having limited longitudinal movement relative tosaid web about said one end, a pressure chamber member carried by saidframe, a diaphragm in said chamber, a pressure rod connecting saiddiaphragm with said roll whereby an increase in pressure in said chambermoves that end of the roll rearwardly relative to'the movement of saidweb, resilient means operable upon a decrease in pressure to move theroll forwardly along the direction of the movement of the web andagainst the action of said pressure rod, means to supply pressure slowlyto said chamber, a bleed valve adapted to bleed air from the source andfrom said chamber, a paddle contacting the edgeof said traveling web,and means connecting the paddle to said bleed valve whereby movement ofthe web transversely in one direction bleeds air from the chamber andeffects longitudinal movement of the roll in one direction under theinfluence of said resilient means, and movement of the web transverselyin the other direction closes the bleed valve to permit air to build upin the chamber and effect longitudinal movement of the roll in theopposite direction.

5. Ina traveling web guide of the character described, a guide roll, aspherical bearing supporting one end of said roll, a frame, a linkpivotally connected to said frame, a spherical bearing in the lower endof said link adapted to receive and rotatably support the opposite endof said guide roll, a chamber-defining member carried by said frame, adiaphragm in said chamber, a pressure rod connecting said diaphragm withsaid link whereby pressure in said chamber moves that end of the rollrearwardly relative to the movement of said Web, a spring connectingsaid link with said frame and constantly urging the last named end ofthe roll forwardly along the direction of the movement of the web,against the action of said pressure rod, a fluid pressure line to supplyfluid pressure 'to said chamber, a bleed valve adapted to bleed fluidunder pressure into said line, a second bleed valve adapted to bleedfluid pressure from said line and from said chamber, a paddle contactingthe edge of said traveling web, and means connecting the paddle to saidsecond bleed valve whereby movement of the web transversely in onedirection opens said second bleed valve and bleeds air from the chamberand causes movement of the roll in one direction and movement of the webtransversely in the other direction closes said second bleed valve topermit air to build up through the first bleed valve into the chamberand causes movement of the roll in the opposite direction.

6. A guide for a felt web or the like comprising a roll adapted toreceive said web, means supporting said roll for rotation about itslongitudinal axis, said means including a spherical bearing journalingone end of said roll and a pivoted arm journaling the other end of saidroll, said spherical bearing accommodating pivoting movement of saidroll about said one end, balanced fluid pressure diaphragm means andresilient spring means for effecting pivoting movement of said armsupporting the other end of said roll, said diaphragm means and saidspring means normally maintaining said roll in an intermediate positionwith its axis of rotation substantially normal to the direction oftravel of the web, a bleed valve having a variable orifice controllingthe pressure on said diaphragm, and follower means contacting said webfor determining the setting of said bleed valve to vary the fluidpressure on said diaphragm thereby causing pivoting movement of said armand said roll about said one roll end to accommodate shifting of saidweb relative to said roll, movement of said roll in one directionagainst the action of said spring means being effected by increasedfluid pressure on said diaphragm'means and in the other direction by theaction of said spring means against reduced fluid pressure on saiddiaphragm.

LLOYD HORN'BOSTEL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS King Oct. 5, 1943

